Excavating-machine.



P. GOODMAN.

EXCAVATING MACHINE.

APPLICATION FILED JUNE 28. 1919.

1,326,337. Patented Dec. 30,1919.-

4 SHEETS- SHEET I.

P. GOODMAN.

EXCAVATING MACHINE.

APPLICATION FILED JUNE 28. I919 1,826,387. Patented Dec. 30,1919.

4 SHEETS-SHEET 2.

5] vweufoz PA T /c/r 6000/ 160 P. GOODMAN.

EXCAVATING MACHINE.

APPLICATION FILED JUNE 28. 1919.

Patented Dec. 30, 1919.

4 SHEETS SHEET 3.

P. GOODMAN.

EXCAVATING MACHINE.

APPLICATION FILED IUNEZB, 1919.

1,326,337 Patented Dec. 30,1919.

4 SHEETSSHEET 4- PATRICK GOODMAN, OF NEW YORK, N. Y.

EXCAVATING-MACHINE Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed June 28, 1919. Serial No. 307,343.

To all whom it may concern:

. Be it known that I, PATRICK GOODMAN, a citizen of the United States, and a resident of New York city, in Bronx county and State of New York, have invented certain new anduseful Improvements in Excavatconvenient form for transportation or stor-' age; to regulate the digging capacity of the tool; and to control the depth of the opera tion of the tool.

Drawings.

Figure 1 is a side elevation of an apparatus constructed and arranged in accordance with the present invention, the digging bucket of the apparatus being shown in position to receive a load.

Fig. 2 is a similar view showing the bucket in partially raised position.

Fig. 3 is a similar view showing the bucket in its fully raised position.

Fig. 4 is a front elevation of the apparatus in the position disclosed in Fig. 3.

Fig. 5 is a side elevation showing the apparatus in the position in which the bucket is dumped.

Fig. 6 is a front elevation of the apparatus on diminished scale showing the hoisting boom and parts connected therewith, laterally disposed, as when dumping the bucket at the side of a trench.

Description.

-13, are stifi' legs 15 and 16. The platform 14 as shown in the drawings is movably mounted on rollers 17 The rollers 17 are employed when a track or other preferable runway is furnished.

The mast 11 is rotated by means of a bull wheel 18. The hull wheel 18 is fixedl secured to the mast '11, and has a hinge lock '19 to form a-bearing for the butt-end of the boom 20 and the pin 21, which pivotally unites the said boom and bloc Theboom 20, as shown in Fig. 4 of the drawings, is constructed of two channel bars 22 which are bolted at the outer extremity to the spacing block 23, and at the inner end to the lugs 24. The block 23 has an opening 25 formed therethrough to hold the sheave 26, around which is rove the cable 27, by whicha dipper stick 28 is manipulated. I

The dipper stick 28 is preferably constructed from two rack bars29. The rack bars 29 are held in spaced relation by the bolting block 31. The guide block 31 extends across the back edge ofthe bars 28 and supports a pin 32 and sprocket wheels 33, the teeth whereof mesh withthe teeth of the bars 29. The pin 32 also serves as a bearing for a brake wheel 34, about which the brake band 35 is passed. The brake band 35 is contracted or expanded upon the wheel 34 by a nut 36 and a lever 37 operatively connected therewith. The lever 37 is enga ed by a flexible'cable 38 that is led over 'suita 1e guides to the base of the mast 11. By this arrangement, whenever the cable 38 is pulled'taut, the extension of th di r stick 28 is fixed, as hereinafter more fully set forth.

The bucket 39 is pivotally suspended by means of a fixed bail 40 and pivot pins 41 therefor, at the free end of the dipper stick. The pins 41 are set in the bucket 39 ofi center, or so that the weight of the bucket 39 and of the load carried thereby rocks the said bucketon the pins 41 until the stop 42 on the side of the bucket engages the edge of the bail 40. In this position the plow-points 43 are vertically disposed as seen best in Figs. 2 and 3 of the drawings.

The bucket 39 is dumped by means of the flexible line 44. The line 44 is rove over the sheaves: 45, 46 and 47, the latter being mounted on the foot block 12.

With an apparatus constructed as above described the operation is as follows:

The platform 14 and superstructure mounted thereon, together with the mast 11, being placed in position on the rollers 17, or their equivalent, the boom 20 is lowered to the position shown in Fig. 1 by paying out the supporting cable 48. Theboom 20 being extended, the dipper stick 28 and bucket 39 mounted thereon are loaded by surface or at the bottom of the trench to be formed, it is drawn toward the platform 14 by means of the cable '44 so that the plowpoints' 43 dig into the earth to loosen the same for delivery within the interior of the bucket 39. I

If desired, the initial operating position of the bucket 43 is extended beyond the end of the boom 20. This is accomplished by permitting the dipper stick 28 to roll on the s rocket wheels 33 until said dipper stick is fu ly extended. Inthis position the cable 38 is drawn taut to hold the band 35 tightly on the pulley 34. This does not prevent the swing of the dipper stick around the pin 32, when the cable 27' is drawn to swing the bucket-carrying end of the dipper stick toward the pulley 26 and the outer end of the boom 20. In this position it will be observed for all intents and purposes, the dip-.

per stick is an extension of the boom 28. This is the position which the apparatus usually assumes when starting excavation of a trench.

If, now, the cable 44 is drawn upon, it will be seen that the plow-points 43 are forced into the ground to loosen the same so that the bucket 39 may gather it. Care should be exercised in starting the trench that the brake band 35 should be partially released to permit the dipper stick 28 to rise between the channel bars 22 of the boom 20 during the recession of the bucket 39.

When the bucket 39 with its load has been drawn into the position shown in Fig. 2, the cable 48 is drawn upon 'to lift the boom to the position shown in Fig. 3. During this operation, the cable 44 is slacked and the weight of the bucket 39 and contents thereof being ofl center from'the pins 41, the bucket 39 retains its upright or holding position.-

When the bucket and dipper stick have reached the position shown in Fig. 3, the mast 11 is turned by drawing on the bull wheel 18. At the same time that this is done, the cable 27 is drawn to lift the dipper stickand load carried thereby, to an elevated position.

After the mast has been rotated, the boom 20 is partially lowered to the position as shown in Fig. 6, in which position the bucket 39 swings away from the boom 20,.

and the bail 40 is placed in the horizontal position where the center of gravity of the ucket 39 being unsupported the bucket is automatically dumped.

It will be understood that as the dipperstick 28 assumes the position shown in Figs.

5 and 6 of the drawings, the stop 42 prevents the bucket 39 swinging and holds the same in fixed relation to the said bail 40, until the center of gravity of the bucket and load carried thereby, passes to the free side of the pins 41, when being unsupported, the bucket swings to the dumping position.

It will be understood that if the bucket should, for any reason, become jammed, it may be rocked to the dumping position by manipulating the cable 44, which will pull the bucket mto position where the center of gravity is unsupported.

Theboom 20 and the dipper stick 28 are preferably constructed of heavy material, the purpose being that where necessary or advantageous, the full weight of the boom and the dipper stick will be imposed upon the bucket. 39. To do this the brake band 35 is tightened on the brake pull 34 and held until it is desired to the weight of the boom and dipper stick.

I As the operation of digging the trench progresses, the platform, and parts carried thereby, are moved away from the open cut and the digging operation of the apparatus is continued. When the trench is completed, the various pivot pins connecting the boom 20 with the mast 11, and the dipper stick 128 with the boom 20 are removed and the convenient form for cartage;

Claims.

1. A machine as characterized comprising the combination of a dig bucket; a dipper stick pivotally connected thereto by a rigld bail and pivot members, said pivot members being disposed on said bucket ad acent one side thereof; stop members set out from said bucket for engaging said bail to prevent the bucket from turning on its pivot through said bail in one direction; and means attached to the side of said bucket removed from said pivot members for drawing said bucket toward its work.

2. In a' machine as characterized the combination of a stiff dipper stick; a supporting boom therefor; a rigidibail extended from the end thereof; a dig bucket having an open end and digging members adjacent thereto, said bucket being pivotally mounted in said bail to rotate therethrou h and arrested by engagement therewith to: e thereafter supported with the center of gravity at one side of said bail when said dipper stick is in approximately vertical position; and means for lifting said dipper stick to horizontally extended position for permitting the bucket to. rotate on its pivot through said bail for inverting said bucket.

means? 7 t 3 an open end and digging members adjacent thereto, said bucket being pivotally mounted in said bail to rotate therethrough and arrested by engagement therewith to be thereafter supported with the center of gravity at one side of said bail when said dipper stick is in approximately vertical position; a

zontally extended position for permittin the bucket to rotate on its pivot throng 10 said bail for inverting said bucket and means for moving said dipper stick and bucket connected therewith vertically for lifting the bucket from its loading situation.

PATRICK GOODMAN. 

